Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

(PHENIX Collaboration)

doi:10.1103/PhysRevD.93.051103

Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

(PHENIX Collaboration)

University of Colorado Boulder
MST-8, Los Alamos National Laboratory
University of Michigan, Ann Arbor
Stony Brook University
RIKEN Nishina Center for Accelerator-Based Science
Riken BNL Research Center
University of Tokyo
Howard University
High Energy Accelerator Research Organization (KEK)
Iowa State University
Kyoto University
Brookhaven National Laboratory
Oak Ridge National Laboratory
Kurchatov Institute
China Institute of Atomic Energy
UMass Amherst
University of California, Riverside
University of New Mexico
Baruch College
Petersburg Nuclear Physics Institute (PNPI)
Vanderbilt University
St. Petersburg State Polytechnical University
Kurchatov Institute
New Mexico State University
Columbia University
University of Illinois at Urbana-Champaign
Chonbuk National University
Seoul National University
Bhabha Atomic Research Centre
Lund University
University of Tsukuba
Weizmann Institute of Science Israel
Muhlenberg College
Eötvös Loránd University
Hungarian Academy of Sciences
Ohio University
Abilene Christian University
University of São Paulo
University of Maryland, College Park
Yonsei University
Rikkyo University
Charles University
Florida State University
Nagasaki Institute of Applied Science
Czech Technical University in Prague
Banaras Hindu University
University of Tennessee
Lawrence Livermore National Laboratory
Augustana University
Georgia State University
Ewha Womans University
Japan Atomic Energy Agency
Hiroshima University
Korea University
University of Debrecen
Myongji University
Université Paris-Saclay
Hanyang University
University of Jyväskylä
University of Zagreb
Tokyo Institute of Technology
Károly Róberts University College
Institute for Nuclear Research of the Russian Academy of Sciences
National Research Nuclear University MEPhI
Université Blaise Pascal
Nara Women's University
Institute of Physics of the Czech Academy of Sciences
Lahore University of Management Sciences
Tsinghua University

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Résumé

We present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W±/Z decays, produced in longitudinally polarized p+p collisions at center of mass energies of s=500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb-1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW/s=0.16.

langue originale	Anglais
Numéro d'article	051103
journal	Physical Review D
Volume	93
Numéro de publication	5
Les DOIs	https://doi.org/10.1103/PhysRevD.93.051103
état	Publié - 23 mars 2016

Accès au document

10.1103/PhysRevD.93.051103

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Contient cette citation

@article{cc8e936ea8864eb39ba2d2e83c0e8ecf,

title = "Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.",

abstract = "We present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W±/Z decays, produced in longitudinally polarized p+p collisions at center of mass energies of s=500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb-1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW/s=0.16.",

author = "\{(PHENIX Collaboration)\} and A. Adare and C. Aidala and Ajitanand, \{N. N.\} and Y. Akiba and R. Akimoto and J. Alexander and M. Alfred and K. Aoki and N. Apadula and Y. Aramaki and H. Asano and Aschenauer, \{E. C.\} and Atomssa, \{E. T.\} and Awes, \{T. C.\} and B. Azmoun and V. Babintsev and M. Bai and X. Bai and Bandara, \{N. S.\} and B. Bannier and Barish, \{K. N.\} and B. Bassalleck and S. Bathe and V. Baublis and C. Baumann and S. Baumgart and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and A. Berdnikov and Y. Berdnikov and D. Black and Blau, \{D. S.\} and Bok, \{J. S.\} and K. Boyle and Brooks, \{M. L.\} and J. Bryslawskyj and H. Buesching and V. Bumazhnov and S. Butsyk and S. Campbell and Chen, \{C. H.\} and Chi, \{C. Y.\} and M. Chiu and Choi, \{I. J.\} and O. Drapier and F. Fleuret and M. Gonin and \{Granier De Cassagnac\}, R.",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = mar,

day = "23",

doi = "10.1103/PhysRevD.93.051103",

language = "English",

volume = "93",

journal = "Physical Review D",

issn = "2470-0010",

number = "5",

}

TY - JOUR

T1 - Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

AU - (PHENIX Collaboration)

AU - Adare, A.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Akimoto, R.

AU - Alexander, J.

AU - Alfred, M.

AU - Aoki, K.

AU - Apadula, N.

AU - Aramaki, Y.

AU - Asano, H.

AU - Aschenauer, E. C.

AU - Atomssa, E. T.

AU - Awes, T. C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bai, M.

AU - Bai, X.

AU - Bandara, N. S.

AU - Bannier, B.

AU - Barish, K. N.

AU - Bassalleck, B.

AU - Bathe, S.

AU - Baublis, V.

AU - Baumann, C.

AU - Baumgart, S.

AU - Bazilevsky, A.

AU - Beaumier, M.

AU - Beckman, S.

AU - Belmont, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Black, D.

AU - Blau, D. S.

AU - Bok, J. S.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Bryslawskyj, J.

AU - Buesching, H.

AU - Bumazhnov, V.

AU - Butsyk, S.

AU - Campbell, S.

AU - Chen, C. H.

AU - Chi, C. Y.

AU - Chiu, M.

AU - Choi, I. J.

AU - Drapier, O.

AU - Fleuret, F.

AU - Gonin, M.

AU - Granier De Cassagnac, R.

PY - 2016/3/23

Y1 - 2016/3/23

N2 - We present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W±/Z decays, produced in longitudinally polarized p+p collisions at center of mass energies of s=500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb-1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW/s=0.16.

AB - We present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W±/Z decays, produced in longitudinally polarized p+p collisions at center of mass energies of s=500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb-1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q2 data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly MW/s=0.16.

U2 - 10.1103/PhysRevD.93.051103

DO - 10.1103/PhysRevD.93.051103

M3 - Article

AN - SCOPUS:84962440767

SN - 2470-0010

VL - 93

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 051103

ER -